[U-Boot] RPi3 Not autobooting from SD-card. {Scanned}

[Jonathan Gray]

On Tue, Mar 06, 2018 at 02:12:23PM +0100, Alexander Graf wrote:
> On 03/06/2018 01:55 PM, Jonathan Gray wrote:
> > On Mon, Mar 05, 2018 at 06:18:59PM +0000, Peter Robinson wrote:
> > > > > > Hi!
> > > > > > I'm trying to boot from u-boot on a Raspberry Pi 3. But for some reason
> > > > > > it
> > > > > > isn't autobooting on the SD-card.
> > > > > > 
> > > > > > Is it possible to get more debug output on the screen console? I don't
> > > > > > have
> > > > > > a serial console at the moment.
> > > > > > The output on the screen is:
> > > > > > 
> > > > > > Net:   No ehternet found.
> > > > > > starting USB...
> > > > > > USB:    Core Release 2.80a
> > > > > > scanning bus 0 for devices... 4 USB Devices found
> > > > > >          scanning usb for storage devices... 0 Storage Device(s) found
> > > > > > Hit any key to stop autoboot:   0
> > > > > > U-Boot>
> > > > > > 
> > > > > > Shouldn't it mention mmc somewhere in the boot message?
> > > > > > 
> > > > > > The first command I type on the prompt is always failing, it's not
> > > > > > outputting anything. Just a new prompt on the next line. The next
> > > > > > commands i
> > > > > > type in are working. Which seems strange.
> > > > > > I got boot.scr set up right, except graphic settings which are wrong. It
> > > > > > is
> > > > > > booting the kernel when I type 'run bootcmd'. But only after I type in
> > > > > > another command before it.
> > > > > > It seems like it's not detecting the SD-card (mmc0) until I have typed
> > > > > > anything into the prompt.
> > > > > > 
> > > > > > Do I have to set any other env variable for it to autoboot? I would have
> > > > > > printed the output of printenv here, but since I don't have a serial
> > > > > > console, retyping everything is very time consuming.
> > > > > > printenv seems to have the right settings. It's basically a full console
> > > > > > screen of variables. It just doesn't seem to load them until I type in
> > > > > > another command before it.
> > > > > > 
> > > > > > boot_targets=mmc0 usb0 pxe dhcp
> > > > > > Which seems right to me.
> > > > > > 
> > > > > > I compiled the latest u-boot from github.
> > > > > > 
> > > > > > If you need more info please let me know and I'll post it.
> > > > > > 
> > > > > > Hope that anyone can point me in the right direction here. Would really
> > > > > > appreciate it.
> > > > > I'm seeing the same issues with 2018.03 rc3.
> > > > > 
> > > > > I'm not sure what the issue is and I've not had time to investigate it
> > > > > further yet, but if you type "boot" and hit enter it should boot,
> > > > > sometimes you actually have to type it twice. It will boot but I'm not
> > > > > sure which bits here have causes this regression.
> > > > 
> > > > I do not see this at all on my RPi3. Maybe it's firmware version dependent?
> > > > Do you happen to have an image that always fails for you?
> > > 2018.03 rc3 with "2018-02-09" firmware (so fairly recent) fails for me.
> > 2018.03 rc4 works fine on rpi_3 here with
> 
> Do you have enable_uart=1 in your config.txt? If you do, it works. If you
> don't, it fails :)

yes, config.txt:

arm_control=0x200
enable_uart=1
device_tree_address=0x100
kernel=u-boot.bin